Wow, I was like shocked for few minutes. Firefox was not showing the request - but it clearly was looking like they were made. Firebug was showing them in the NET view, but with request header set to Options???? Then I went to chrome and the console there complained about the "same origine policy"
So basically you are accessing the site with www, but hotspots is sending the requests to the non-www version - which btw should not happen, because we request the full URL from joomla and if you are on the www site, it should return www in the url, but it doesn't on your. Do you have a redirect extension installed or so?
Anyway if you access the site without www, then it is working:
engage4peace.org/route-map#!/catid=2
Why not make an htaccess redirect to the non-www version of the site? WWW is so 1990...
Cheers,
Daniel